1350309 has 4 divisors (see below), whose sum is σ = 1800416. Its totient is φ = 900204.

The previous prime is 1350287. The next prime is 1350313. The reversal of 1350309 is 9030531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9030531 = 3 ⋅3010177.

It is not a de Polignac number, because 1350309 - 2⁵ = 1350277 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1350319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225049 + ... + 225054.

It is an arithmetic number, because the mean of its divisors is an integer number (450104).

2^1350309 is an apocalyptic number.

It is an amenable number.

1350309 is a deficient number, since it is larger than the sum of its proper divisors (450107).

1350309 is an equidigital number, since it uses as much as digits as its factorization.

1350309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450106.

The product of its (nonzero) digits is 405, while the sum is 21.

The square root of 1350309 is about 1162.0279686823. The cubic root of 1350309 is about 110.5293766547.

The spelling of 1350309 in words is "one million, three hundred fifty thousand, three hundred nine".